see if this helps... https://www.sec.gov/about/offices/ocie/aml2007/fincen-advissu7.pdf
and i've selected snipped a bit:
Only transmittals of funds equal to or greater than $3,000 (or its foreign equivalent) are subject to
this rule, regardless of whether or not currency is involved. In addition, transmittals of funds governed
by the Electronic Funds Transfer Act (Reg E) or made through ATM, or point of sale systems are not
subject to this rule.
An intermediary financial institution must pass on all of the information it receives from a transmittorâ€™s
financial institution or the preceding intermediary financial institution, but has no general duty to retrieve
information not provided by the transmittorâ€™s financial institution or the preceding intermediary financial
institution. Exceptions are noted below.
However, if the system used to effect the transmittal of funds is not currently designed to enable these
requirements to be met, the name, address, account of the transmittor and the identity of the transmittorâ€™s
financial institution need not be passed on until such time as the bank that sends the order (to the Federal
Reserve Bank or otherwise) completes its conversion to the expanded Fedwire message format